BibTeX:
@incollection{Various,
  author = {Various},
  title = {Bahá'u'lláh Would Not Leave Him Behind},
  booktitle = {bahaistories.com archive},
  url = {https://bahaistories.com/subject/bahaullah-exile},
}

APA:
Various. Bahá'u'lláh Would Not Leave Him Behind. In *bahaistories.com archive*.

MLA:
Various. "Bahá'u'lláh Would Not Leave Him Behind." *bahaistories.com archive*, n.d..

Chicago:
Various. "Bahá'u'lláh Would Not Leave Him Behind." In *bahaistories.com archive*, n.d..